Someone help me with this question

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me